Question
On Sunday, six trains (i.e. train 1, train 2 and so on)
are standing on six different platforms respectively from left to right facing North. Next day, all the trains are there on the same six platforms in such a way that no train is on the same platform as on the Sunday. On Monday, following observation are made: (i) Train 2 was immediately to the left of Train 5. (ii) Train 4 has Train 6 to its immediate left and neither of them were at Train 3’s original place. (iii) Train 1 has Train 3 on its immediate right and Train 5 on its immediate left. If an even numbered train is at the East end on Monday, which train is fourth from the right end.Solution
From the given information at (i), (ii) and (iii), there are two possibilities : Possibility I : 6 4 2 5 1 3 Possibility 2 : 2 5 1 3 6 4 But since, in the question, it is said that an even numbered train is at the East end, possibility II is the correct arrangement.
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